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- ReferenceError: "x" is not defined
- Wrong scope
- Valid cases
- Update older browsers
- SyntaxError: a declaration in the head of a for-of loop can't have an initializer
- Valid for-of loop
- SyntaxError: arguments is not valid in fields
- TypeError: 'x' is not iterable
- Iterating over Object properties
- Iterating over a generator
- Iterating over a custom iterable
- TypeError: can't assign to property "x" on "y": not an object
- Common JavaScript Errors: ReferenceError, SyntaxError, and TypeError Quiz 5 questions
Well done!
You have completed (UPI) Chapter 11: Managing Errors, Debugging, and Handling Events in JavaScript!
Instruction
Update older browsers
If you are using an older browser that does not yet implement let or class, for example, you should update to a more recent browser version that does support these new language features.
"use strict";
class DocArchiver {}
// SyntaxError: class is a reserved identifier
// (throws in older browsers only, e.g., Firefox 44 and older)